APA (7th ed.) Citation

Ryder, R. T., Harris, A. G., & Repetski, J. E. (1992). Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian Basin from Medina County, Ohio, through southwestern and south-central Pennsylvania to Hampshire County, West Virginia. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Ryder, Robert T., Anita G. Harris, and John E. Repetski. Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Medina County, Ohio, Through Southwestern and South-central Pennsylvania to Hampshire County, West Virginia. [Reston, Va.]: U.S. Department of the Interior, U.S. Geological Survey, 1992.

MLA (9th ed.) Citation

Ryder, Robert T., et al. Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Medina County, Ohio, Through Southwestern and South-central Pennsylvania to Hampshire County, West Virginia. U.S. Department of the Interior, U.S. Geological Survey, 1992.